Study on Voltage Sag Flexible Management Strategy with Energy Storage Device

doi:10.3969/j.issn.1008-0198.2022.04.007

Abstract

Abstract: In order to reduce the influence of power grid voltage sag on the safe operation of sensitive loads, this paper proposes a flexible voltage sag management strategy with energy storage device, which can take into account voltage sag management while peak clipping and valley filling. Firstly, the DC component of power grid voltage is extracted by differentiating the dq component of power grid voltage to realize the accurate detection of power grid voltage sag amplitude and phase, and achieve the effect of improving the dynamic response speed of the system. Secondly, in the power grid voltage sag and recovery stage, the flexible switching strategy is used to realize the flexible compensation of sag voltage, so as to reduce the current impact of sensitive loads before and after voltage sag and ensure the steady-state accuracy of output voltage. Finally, a simulation model is built on MATLAB/Simulink platform to verify the correctness and effectiveness of the proposed flexible governance control strategy.

Key words: sensitive load, energy storage device, voltage sag, flexible switch

CLC Number:

TM714.2

ZENG Jinhui, HUANG Xi, WANG Can, LAN Zheng, LIANG Bowen. Study on Voltage Sag Flexible Management Strategy with Energy Storage Device[J]. Hunan Electric Power, 2022, 42(4): 33-39.

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